15
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ClassR-F AMPLIFIER PENTODE
BaseSmall 5-Pin
Filament2V @ 220mA
Construction
Primary Typepentode
EnvelopeST-12
Sections1
Filament / Heater
Heater NotesD.C.
Absolute Maximum Ratings
Plate Voltage135 V
Grid 2 Voltage67.5 V
Grid 1 Voltage-1.5 V
H-C Voltage22.5 V
Audio Performance
Key Features
- Heater-cathode pentode
- 2.0-volt type
- Battery-operated receiver use
- Separate cathode connection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier (67.5V Plate) | 67.5V | 710 | 630000 | 450 | 1.85mA |
| RF Amplifier (135V Plate) | 135V | 750 | 800000 | 600 | 1.85mA |
Application Notes
The application of the 15 is similar to that of type 32. The heater-cathode construction permits operation where a separate cathode connection is required.
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